ServiceWorker: Implement StartWorker by using mojo

content/browser/service_worker/embedded_worker_registry.cc

Index: content/browser/service_worker/embedded_worker_registry.cc
diff --git a/content/browser/service_worker/embedded_worker_registry.cc b/content/browser/service_worker/embedded_worker_registry.cc
index 51d3c2c5ca2d368f5c1dbb27e3277fdad58fe1cf..5d8882788f6f98600ec2e403d6950f2ed241964c 100644
--- a/content/browser/service_worker/embedded_worker_registry.cc
+++ b/content/browser/service_worker/embedded_worker_registry.cc
@@ -265,10 +265,30 @@ ServiceWorkerStatusCode EmbeddedWorkerRegistry::SendStartWorker(
   ServiceWorkerStatusCode status =
       Send(process_id, new EmbeddedWorkerMsg_StartWorker(*params));
   if (status == SERVICE_WORKER_OK)
-    worker_process_map_[process_id].insert(embedded_worker_id);
+    AddWorker(process_id, embedded_worker_id);
   return status;
 }
 
+ServiceWorkerStatusCode EmbeddedWorkerRegistry::AddWorker(
+    int process_id,
+    int embedded_worker_id) {
+  if (!context_)
+    return SERVICE_WORKER_ERROR_ABORT;
+
+  // The ServiceWorkerDispatcherHost is supposed to be created when the process
+  // is created, and keep an entry in process_sender_map_ for its whole
+  // lifetime.
+  DCHECK(base::ContainsKey(process_sender_map_, process_id));
+  DCHECK(GetWorker(embedded_worker_id));
+  DCHECK_EQ(GetWorker(embedded_worker_id)->process_id(), process_id);
+  DCHECK(
+      !base::ContainsKey(worker_process_map_, process_id) ||
+      !base::ContainsKey(worker_process_map_[process_id], embedded_worker_id));
+
+  worker_process_map_[process_id].insert(embedded_worker_id);
+  return SERVICE_WORKER_OK;
+}
+
 ServiceWorkerStatusCode EmbeddedWorkerRegistry::Send(
     int process_id, IPC::Message* message_ptr) {
   std::unique_ptr<IPC::Message> message(message_ptr);